DOĞAL VOLLASTONİTİN YÜKSEK PERFORMANSLI HARÇLAR ÜZERİNE ETKİLERİ

Yıl 2020, Cilt: 9 Sayı: 2, 966 - 974, 07.08.2020

Hatice Öznur Öz , Hasan Erhan Yücel , Muhammet Güneş , Beytullah Malkoç

https://doi.org/10.28948/ngumuh.725269

Öz

Bu çalışma kapsamında Finlandiya’dan temin edilen doğal vollastonitin, yüksek performanslı harcın (YPH) dayanım ve durabilite özellikleri üzerindeki etkileri araştırılmıştır. YPH üretim aşamasında su/bağlayıcı oranı sabit tutularak, vollastonit minerali %3, %6, %9, %12 ve %15 oranlarında karışıma eklenmiştir. Ayrıca yüksek oranda su azaltıcı katkı maddesi (SA) vasıtasıyla karışımın işlenebilirliği sağlanmıştır. Basınç, eğilme ve ultrasonik titreşim hızı testleri 3., 7., 28. ve 90. günlerde yapılırken, kılcal su geçirimliliği ve gaz geçirimliliği deneyleri 28. ve 90. günde uygulanmıştır. Bu deneylerden elde edilen sonuçlara göre, %3 vollastonit içeren karışımda tüm deneyler için performansta iyileşme gözlenmiştir. %6 vollastonit içeriğine sahip karışımda ise kontrol harcına oranla daha iyi sonuçlar elde edilirken, %3 vollastonit içeren karışıma göre performansta azalmalar gözlenmiştir.

Anahtar Kelimeler

Basınç, Durabilite, Eğilme, Gaz geçirimliliği, UTH, Vollastonit, Yüksek performanslı harç

THE EFFECTS ON HIGH PERFORMANCE MORTARS OF NATURAL WOLLASTONITE

Öz

In this study, the effects of natural wollastonite obtained from Finland on strength and durability properties of HPM of wollastonite were investigated. In the production of HPM, wollastonite mineral was added to the mixture at 3%, 6%, 9%, 12% and 15% by keeping the water/binder ratio constant. In addition, the workability of the mixture was achieved by means of a high range water reducing admixture (SP). Compressive, flexural and ultrasonic pulse velocity tests were conducted at 3, 7, 28 and 90 days while sorptivity and gas permeability tests were applied at 28 and 90 days. According to the obtained results of these tests, it was observed that the mixtures containing 3% wollastonite had the recuperation in performance for all experiments. Compared to the control mortar, the mixture containing 6% wollastonite indicated the better results whereas the reduction in performance was observed in the comparison the mixture containing 3% wollastonite.

Anahtar Kelimeler

Compressive, Durability, Flexural, Gas permeability, UPV, Wollastonite, High performance mortar

Kaynakça

• D. Harbec, A. Zidol, A. Tagnit-Hamou, and F. Gitzhofer, ‘‘Mechanical and durability properties of high performance glass fume concrete and mortars,’’ Construction and Building Materials, vol. 134, pp. 142-156, 2017.
• M. Mazloom, A. A. Ramezanianpour, and J. J. Brooks, ‘‘Effect of silica fume on mechanical properties of high-strength concrete,’’ Cement and Concrete Composites, vol. 26, pp. 347-357, 2004.
• H. E. Yücel, and S. Özcan, ‘‘Strength characteristics and microstructural properties of cement mortars incorporating synthetic wollastonite produced with a new technique,’’ Construction and Building Materials, vol. 223, pp. 165-176, 2019.
• P. Kalla, A. Rana, Y. B. Chad, A. Misra, and L. Csetenyi, ‘‘Durability studies on concrete containing wollastonite,’’ Journal of Cleaner Production, vol. 87, pp. 726-734, 2015.
• M. A. Wahab, I. A. Latif, M. Kohail, and A. Almasry, ‘‘The use of wollastonite to enhance the mechanical properties of mortar mixes,’’ Construction and Building Materials, vol. 152, pp. 304-309, 2017.
• R. Mathur, A. K. Misra, and P. Goel, ‘‘Influence of wollastonite on mechanical properties of concrete,’’ Journal of Scientific and Industrial Research, vol. 66, pp. 1029-1034, 2007.
• P. Kalla, A. Misra, R. C. Gupta, L. Csetenyi, V. Gahlot, and A. Arora, ‘Mechanical and durability studies on concrete containing wollastonite-fly ash combination’’, Construction and Building Materials, vol. 40, pp. 1142-1150, 2013.
• V. Dey, R. Kachala, A. Bonakdar, and B. Mobasher, ‘‘Mechanical properties of micro and sub-micron wollastonite fibers in cementitious composites,’’ Construction and Building Materials, vol. 82, pp. 351-359, 2015.
• ASTM C305, ‘‘Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency,’’ American Society for Testing and Materials, ASTM International, West Conshohocken, United States, 2017.
• ASTM C1437, ‘‘Standard test method for flow of hydraulic cement mortar,’’ American Society for Testing and Materials, ASTM International, West Conshohocken, United States, 2017.
• ASTM C349, ‘‘Standard test method for compressive strength of hydraulic-cement mortars (using portions of prisms broken in flexure)’’, American Society for Testing and Materials, ASTM International, West Conshohocken, United States, 2017.
• ASTM C348, ‘‘Standard test method for flexural strength of hydraulic-cement mortars,’’ American Society for Testing and Materials, ASTM International, West Conshohocken, United States, 2017.
• ASTM C597, ‘‘Standard test method for pulse velocity through concrete,’’ American Society for Testing and Materials, ASTM International, West Conshohocken, United States, 2016.
• RILEM TC 116-PCD, ‘‘Permeability of concrete as a criterion of its durability,’’ Materials and Structures, vol. 32, pp. 174-179, 1999.
• S. A. Zareei, F. Ameri, P. Shoaei, and N. Bahrami, ‘‘Recycled ceramic waste high strength concrete containing wollastonite particles and micro-silica: A comprehensive experimental study,’’ Construction and Building Materials, vol. 11–32, pp. 201, 2019.
• P. C. Tatnall, ‘‘Fiber-reinforced concrete. In: J. F. Lamond, and J. H. Pielert, editors, ‘‘Significance of tests and properties of concrete and concrete-making materials (STP 169D),’’ ASTM International, West Conshohocken, vol. 49, pp. 578-594, 2006.
• H. Ö. Öz, H. E. Yücel, M. Güneş and Ç. Duymaz, ‘‘The effects of natural wollastonite on mechanical and durability properties of standard mortars,’’ in 6th Internatıonal Conference on Materials Science and Nanotechnology for Next Generation (MSNG2019), 2019, pp. 265-269
• G. D. Ransinchung, B. Kumar, and V. Kumar, ‘‘Assessment of water absorption and chloride ion penetration of pavement quality concrete admixed with wollastonite and microsilica,’’ Construction and Building Materials, vol. 23, pp. 1168-1177, 2009.